The effect of bacteria on the solubilization of silica in diatom frustules

The effect of bacteria on the solubilization of silica in diatom frustules
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细菌对硅藻壳中二氧化硅溶解的影响

DOI：
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发表时间：
1985
期刊：
影响因子：
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通讯作者：
A. Holding
A. Holding
中科院分区：
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文献类型：
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作者：
S. Patrick;A. Holding

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帕特里克，希拉和控股，A.J.1985年。细菌对硅藻球茎中二氧化硅增溶的影响。应用细菌学杂志59，7-16。 与无菌自溶相比，在25dC下，来自莱文湖和尼格湖的水样中的自然细菌种群增加了来自无菌梅氏环藻培养的小球茎二氧化硅的增溶速度。与用氯化汞灭菌的对照培养物相比，湖水中的细菌数量也增加了非无菌培养物中硅胶的增溶作用。与福尔摩沙共同孵化的Lough Neagh种群也得到了类似的结果。与未经处理的细胞相比，超声处理的硅藻细胞并没有增加二氧化硅的释放。与无菌对照相比，来自淡水湖的纯细菌培养促进了非无菌福尔摩沙和无菌门氏沼虾SiO_2的释放。培养物溶解小球茎二氧化硅的能力的变化似乎与它们产生水解酶的潜力有关。莱文湖和尼格湖水体细菌的自然种群和某些细菌培养导致硅藻聚集，这并没有促进二氧化硅的释放。
Patrick, Sheila & Holding, A.J. 1985. The effect of bacteria on the solubilization of silica in diatom frustules. Journal of Applied Bacteriology59, 7–16. Natural bacterial populations in samples of water from Loch Leven and Lough Neagh increased the rate of solubilization of frustule silica from an axenic Cyclotella meneghiniana culture, compared with sterile autolysis, at 25dC. In the inoculated cultures 50–60% of the silica was solubilized over a period of 30 d. Bacterial populations in Loch Leven water also enhanced the solubilization of silica from non-axenic cultures of Asterionella formosa, Tabellaria flocculosa, Navicula pellicu-losa and C. meneghiniana, compared with control cultures sterilized with mercuric chloride. Similar results were obtained with Lough Neagh populations incubated with A. formosa. In comparison with untreated cells, the treatment of diatom cells with ultra-sonication did not increase the release of silica. Pure cultures of bacteria from Loch Leven water enhanced the release of silica from non-axenic A. formosa and axenic C. meneghiniana compared with sterile control treatments. The variation in the ability of cultures to solubilize the frustule silica appeared to be related to their potential to produce hydrolytic enzymes. Natural populations of Loch Leven and Lough Neagh water bacteria and certain bacterial cultures caused the diatoms to aggregate, which did not enhance the release of silica.